package main

import (
	"fmt"
	"net/http"
	"os"
)

func NotFoundHandler(w http.ResponseWriter, r *http.Request) {
	home_url := os.Getenv("HOME_URL")
	w.WriteHeader(http.StatusNotFound)
	w.Header().Set("Server", "MeowMusicServer")
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	fmt.Fprint(w, "<head><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"><meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\"><link rel=\"icon\" href=\"favicon.ico\"><title>404 Music Lost!</title><style>@import url('https://fonts.googleapis.com/css?family=Montserrat:400,600,700');@import url('https://fonts.googleapis.com/css?family=Catamaran:400,800');.error-container {text-align: center;font-size: 106px;font-family: 'Catamaran', sans-serif;font-weight: 800;margin: 70px 15px;}.error-container>span {display: inline-block;position: relative;}.error-container>span.four {width: 136px;height: 43px;border-radius: 999px;background:linear-gradient(140deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.07) 43%, transparent 44%, transparent 100%),linear-gradient(105deg, transparent 0%, transparent 40%, rgba(0, 0, 0, 0.06) 41%, rgba(0, 0, 0, 0.07) 76%, transparent 77%, transparent 100%),linear-gradient(to right, #d89ca4, #e27b7e);}.error-container>span.four:before,.error-container>span.four:after {content: '';display: block;position: absolute;border-radius: 999px;}.error-container>span.four:before {width: 43px;height: 156px;left: 60px;bottom: -43px;background:linear-gradient(128deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.07) 40%, transparent 41%, transparent 100%),linear-gradient(116deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0.07) 50%, transparent 51%, transparent 100%),linear-gradient(to top, #99749D, #B895AB, #CC9AA6, #D7969E, #E0787F);}.error-container>span.four:after {width: 137px;height: 43px;transform: rotate(-49.5deg);left: -18px;bottom: 36px;background: linear-gradient(to right, #99749D, #B895AB, #CC9AA6, #D7969E, #E0787F);}.error-container>span.zero {vertical-align: text-top;width: 156px;height: 156px;border-radius: 999px;background: linear-gradient(-45deg, transparent 0%, rgba(0, 0, 0, 0.06) 50%, transparent 51%, transparent 100%),linear-gradient(to top right, #99749D, #99749D, #B895AB, #CC9AA6, #D7969E, #ED8687, #ED8687);overflow: hidden;animation: bgshadow 5s infinite;}.error-container>span.zero:before {content: '';display: block;position: absolute;transform: rotate(45deg);width: 90px;height: 90px;background-color: transparent;left: 0px;bottom: 0px;background:linear-gradient(95deg, transparent 0%, transparent 8%, rgba(0, 0, 0, 0.07) 9%, transparent 50%, transparent 100%),linear-gradient(85deg, transparent 0%, transparent 19%, rgba(0, 0, 0, 0.05) 20%, rgba(0, 0, 0, 0.07) 91%, transparent 92%, transparent 100%);}.error-container>span.zero:after {content: '';display: block;position: absolute;border-radius: 999px;width: 70px;height: 70px;left: 43px;bottom: 43px;background: #FDFAF5;box-shadow: -2px 2px 2px 0px rgba(0, 0, 0, 0.1);}.screen-reader-text {position: absolute;top: -9999em;left: -9999em;}@keyframes bgshadow {0% {box-shadow: inset -160px 160px 0px 5px rgba(0, 0, 0, 0.4);}45% {box-shadow: inset 0px 0px 0px 0px rgba(0, 0, 0, 0.1);}55% {box-shadow: inset 0px 0px 0px 0px rgba(0, 0, 0, 0.1);}100% {box-shadow: inset 160px -160px 0px 5px rgba(0, 0, 0, 0.4);}}* {-webkit-box-sizing: border-box;-moz-box-sizing: border-box;box-sizing: border-box;}body {background-color: #FDFAF5;margin-bottom: 50px;}html,button,input,select,textarea {font-family: 'Montserrat', Helvetica, sans-serif;color: #bbb;}h1 {text-align: center;margin: 30px 15px;}.zoom-area {max-width: 490px;margin: 30px auto 30px;font-size: 19px;text-align: center;}.link-container {text-align: center;}a.more-link {text-transform: uppercase;font-size: 13px;background-color: #de7e85;padding: 10px 15px;border-radius: 0;color: #fff;display: inline-block;margin-right: 5px;margin-bottom: 5px;line-height: 1.5;text-decoration: none;margin-top: 50px;letter-spacing: 1px;}</style></head><body><h1>404 Music Lost!</h1><p class=\"zoom-area\">We couldn't find the content you were looking for.</p><section class=\"error-container\"><span class=\"four\"><span class=\"screen-reader-text\">4</span></span><span class=\"zero\"><span class=\"screen-reader-text\">0</span></span><span class=\"four\"><span class=\"screen-reader-text\">4</span></span></section>")
	fmt.Fprintf(w, "<div class=\"link-container\"><a href=\"%s\" class=\"more-link\">Go Home</a></div></body>", home_url)
}
